Slang is a shading language and compiler maintained by the Khronos
Group. It extends HLSL with modules, generics, interfaces and automatic
differentiation, and targets SPIR-V, GLSL, HLSL, Metal, WGSL, CUDA and
C++.

This is a binary repack of upstream's official Linux x86_64 release
tarball, not a source build. Building slang from source pulls in LLVM
along with several bundled dependencies, so the prebuilt tarball is
packaged instead.

The tree is installed under /opt/slang-bin-$VERSION and the command line
tools (slangc, slangd, slangi, slang) are symlinked into /usr/bin. The
binaries locate their libraries through a RUNPATH of $ORIGIN/../lib, so
the bin/ and lib/ directories must stay siblings; do not move them
apart.

This package is x86_64 only. Upstream also ships an aarch64 tarball,
which this script does not handle.

kitty 0.49.0 and later require slangc at build time to compile their
shaders, which is the main reason this package exists.